HYDROGEL DRILLING FLUID Russian patent published in 2023 - IPC C09K8/18 

FIELD: construction of oil and gas wells.

SUBSTANCE: invention relates namely to drilling fluids that are suitable both for drilling a transport trunk represented by terrigenous rocks, and for opening productive formations of directional and horizontal wells with ultra-long waste. The drilling mud contains, wt.%: bentonite clay 1.00-2.00; filtration regulator STARFLOK 2.00-3.00; lubricant additive - LUBRICANT BL 2.00-3.00; for peptization of bentonite clay - sodium hydroxide 0.10-0.30; clay modifying additive REGVIZ 0.07-0.15; clay-modifying additive REAGENT "NV" grade K 0.15-0.25; as a carbonate weighting agent - multi-fraction marble ground to 29.00; to prevent swelling and shedding of clay-containing rocks - sodium chloride 0.00-20.00; water the rest.

EFFECT: preservation of holding capacity when drilling inclined and horizontal shafts, efficient removal of cuttings from the well, and expansion of the arsenal of tools.

1 cl, 2 tbl, 2 ex